mirror of https://github.com/k3s-io/k3s
84 lines
2.8 KiB
Go
84 lines
2.8 KiB
Go
|
/*
|
||
|
|
Copyright 2017 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package discovery
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net/http"
|
||
|
|
|
||
|
|
restful "github.com/emicklei/go-restful"
|
||
|
|
|
||
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||
|
|
"k8s.io/apimachinery/pkg/runtime"
|
||
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
||
|
|
"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
|
||
|
|
"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
|
||
|
|
)
|
||
|
|
|
||
|
|
type APIResourceLister interface {
|
||
|
|
ListAPIResources() []metav1.APIResource
|
||
|
|
}
|
||
|
|
|
||
|
|
type APIResourceListerFunc func() []metav1.APIResource
|
||
|
|
|
||
|
|
func (f APIResourceListerFunc) ListAPIResources() []metav1.APIResource {
|
||
|
|
return f()
|
||
|
|
}
|
||
|
|
|
||
|
|
// APIVersionHandler creates a webservice serving the supported resources for the version
|
||
|
|
// E.g., such a web service will be registered at /apis/extensions/v1beta1.
|
||
|
|
type APIVersionHandler struct {
|
||
|
|
serializer runtime.NegotiatedSerializer
|
||
|
|
|
||
|
|
groupVersion schema.GroupVersion
|
||
|
|
apiResourceLister APIResourceLister
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewAPIVersionHandler(serializer runtime.NegotiatedSerializer, groupVersion schema.GroupVersion, apiResourceLister APIResourceLister) *APIVersionHandler {
|
||
|
|
if keepUnversioned(groupVersion.Group) {
|
||
|
|
// Because in release 1.1, /apis/extensions returns response with empty
|
||
|
|
// APIVersion, we use stripVersionNegotiatedSerializer to keep the
|
||
|
|
// response backwards compatible.
|
||
|
|
serializer = stripVersionNegotiatedSerializer{serializer}
|
||
|
|
}
|
||
|
|
|
||
|
|
return &APIVersionHandler{
|
||
|
|
serializer: serializer,
|
||
|
|
groupVersion: groupVersion,
|
||
|
|
apiResourceLister: apiResourceLister,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *APIVersionHandler) AddToWebService(ws *restful.WebService) {
|
||
|
|
mediaTypes, _ := negotiation.MediaTypesForSerializer(s.serializer)
|
||
|
|
ws.Route(ws.GET("/").To(s.handle).
|
||
|
|
Doc("get available resources").
|
||
|
|
Operation("getAPIResources").
|
||
|
|
Produces(mediaTypes...).
|
||
|
|
Consumes(mediaTypes...).
|
||
|
|
Writes(metav1.APIResourceList{}))
|
||
|
|
}
|
||
|
|
|
||
|
|
// handle returns a handler which will return the api.VersionAndVersion of the group.
|
||
|
|
func (s *APIVersionHandler) handle(req *restful.Request, resp *restful.Response) {
|
||
|
|
s.ServeHTTP(resp.ResponseWriter, req.Request)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *APIVersionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
|
||
|
|
responsewriters.WriteObjectNegotiated(s.serializer, schema.GroupVersion{}, w, req, http.StatusOK,
|
||
|
|
&metav1.APIResourceList{GroupVersion: s.groupVersion.String(), APIResources: s.apiResourceLister.ListAPIResources()})
|
||
|
|
}
|